Question

{(112+3)-(5×10-17)+4}÷4

Answer 1

${(112 + 3) - (5 \times 10 - 17) + 4} \div 4 \\ =((115 - 33) + 4) \div 4 \\ = (82+ 4) \div 4 \\ = 86 \div 4 \\ = 21.5$